What did Hozier think of Demi singing his smash hit?

Demi Lovato is burning up the air waves in the US with her latest hit "Cool For the Summer."

However, it's her live cover of Hozier's "Take Me To Church" that's all the buzz in UK.

In fact, Hozier tweeted, ""Hey! Huge thank you to @ddlovato for doing this gorgeous cover of TMTC in the #LiveLounge today. Very Flattered."

Ready to hear Demi Lovato like you've never heard her before?  Click below.